Pioneer SGX-CA600 User Manual page 257

When the Bluetooth heartbeat sensor is connected, the connection of
the Bluetooth heartbeat sensor is temporarily disconnected.
5
Use the [←]/[→] buttons to select the check box of the sen-
sor you wish to connect.
The sensors with check boxes selected are added to the sensor list.
Clear the check mark for any sensor that does not need to be added to
the sensor list in advance.
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